/*
* TouchGraph LLC. Apache-Style Software License
*
*
* Copyright (c) 2001-2002 Alexander Shapiro. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by
* TouchGraph LLC (http://www.touchgraph.com/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "TouchGraph" or "TouchGraph LLC" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* alex@touchgraph.com
*
* 5. Products derived from this software may not be called "TouchGraph",
* nor may "TouchGraph" appear in their name, without prior written
* permission of alex@touchgraph.com.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL TOUCHGRAPH OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
*/
package com.touchgraph.graphlayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Dimension;
/** Edge.
*
* @author Alexander Shapiro
* @version 1.21 $Id: Edge.java,v 1.1.1.1 2007/01/07 07:58:19 andrew Exp $
*/
public class Edge {
public static Color DEFAULT_COLOR = Color.decode("#0000B0");
public static Color MOUSE_OVER_COLOR = Color.pink;
public static int DEFAULT_LENGTH = 40;
public Node from; //Should be private, changing from effects "from" Node
public Node to; //Should be private, changing from effects "to" Node
protected Color col;
protected int length;
protected boolean visible;
protected String id = null;
// ............
/** Constructor with two Nodes and a length.
*/
public Edge(Node f, Node t, int len) {
from = f;
to = t;
length = len;
col = DEFAULT_COLOR;
visible = false;
}
/** Constructor with two Nodes, which uses a default length.
*/
public Edge(Node f, Node t) {
this(f, t, DEFAULT_LENGTH);
}
// setters and getters ...............
public static void setEdgeDefaultColor( Color color ) { DEFAULT_COLOR = color; }
public static void setEdgeMouseOverColor( Color color ) { MOUSE_OVER_COLOR = color; }
public static void setEdgeDefaultLength( int length ) { DEFAULT_LENGTH = length; }
/** Returns the starting "from" node of this edge as Node. */
public Node getFrom() { return from; }
/** Returns the terminating "to" node of this edge as Node. */
public Node getTo() { return to; }
/** Returns the color of this edge as Color. */
public Color getColor() {
return col;
}
/** Set the color of this Edge to the Color <tt>color</tt>. */
public void setColor( Color color ) {
col = color;
}
/** Returns the ID of this Edge as a String. */
public String getID()
{
return id;
}
/** Set the ID of this Edge to the String <tt>id</tt>. */
public void setID( String id )
{
this.id=id;
}
/** Returns the length of this Edge as a double. */
public int getLength() {
return length;
}
/** Set the length of this Edge to the int <tt>len</tt>. */
public void setLength(int len) {
length=len;
}
/** Set the visibility of this Edge to the boolean <tt>v</tt>. */
public void setVisible( boolean v) {
visible = v;
}
/** Return the visibility of this Edge as a boolean. */
public boolean isVisible() {
return visible;
}
public Node getOtherEndpt(Node n) { //yields false results if Node n is not an endpoint
if (to != n) return to;
else return from;
}
/** Switches the endpoints of the edge */
public void reverse() {
Node temp = to;
to = from;
from = temp;
}
public boolean intersects(Dimension d) {
int x1 = (int) from.drawx;
int y1 = (int) from.drawy;
int x2 = (int) to.drawx;
int y2 = (int) to.drawy;
return (((x1>0 || x2>0) && (x1<d.width || x2<d.width)) &&
((y1>0 || y2>0) && (y1<d.height || y2<d.height) ));
}
public double distFromPoint(double px, double py) {
double x1= from.drawx;
double y1= from.drawy;
double x2= to.drawx;
double y2= to.drawy;
if (px<Math.min(x1, x2)-8 || px>Math.max(x1, x2)+8 ||
py<Math.min(y1, y2)-8 || py>Math.max(y1, y2)+8)
return 1000;
double dist = 1000;
if (x1-x2!=0) dist = Math.abs((y2-y1)/(x2-x1)*(px - x1) + (y1 - py));
if (y1-y2!=0) dist = Math.min(dist, Math.abs((x2-x1)/(y2-y1)*(py - y1) + (x1 - px)));
return dist;
}
public boolean containsPoint(double px, double py) {
return distFromPoint(px,py)<10;
}
public static void paintArrow(Graphics g, int x1, int y1, int x2, int y2, Color c) {
//Forget hyperbolic bending for now
g.setColor(c);
int x3=x1;
int y3=y1;
double dist=Math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1));
if (dist>10) {
double adjustDistRatio = (dist-10)/dist;
x3=(int) (x1+(x2-x1)*adjustDistRatio);
y3=(int) (y1+(y2-y1)*adjustDistRatio);
}
x3=(int) ((x3*4+x1)/5.0);
y3=(int) ((y3*4+y1)/5.0);
g.drawLine(x3, y3, x2, y2);
g.drawLine(x1, y1, x3, y3);
g.drawLine(x1+1, y1, x3, y3);
g.drawLine(x1+2, y1, x3, y3);
g.drawLine(x1+3, y1, x3, y3);
g.drawLine(x1+4, y1, x3, y3);
g.drawLine(x1-1, y1, x3, y3);
g.drawLine(x1-2, y1, x3, y3);
g.drawLine(x1-3, y1, x3, y3);
g.drawLine(x1-4, y1, x3, y3);
g.drawLine(x1, y1+1, x3, y3);
g.drawLine(x1, y1+2, x3, y3);
g.drawLine(x1, y1+3, x3, y3);
g.drawLine(x1, y1+4, x3, y3);
g.drawLine(x1, y1-1, x3, y3);
g.drawLine(x1, y1-2, x3, y3);
g.drawLine(x1, y1-3, x3, y3);
g.drawLine(x1, y1-4, x3, y3);
}
public void paint(Graphics g, TGPanel tgPanel) {
Color c = (tgPanel.getMouseOverE()==this) ? MOUSE_OVER_COLOR : col;
int x1=(int) from.drawx;
int y1=(int) from.drawy;
int x2=(int) to.drawx;
int y2=(int) to.drawy;
if (intersects(tgPanel.getSize())) paintArrow(g, x1, y1, x2, y2, c);
}
} // end com.touchgraph.graphlayout.Edge